Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbaa42ecb0f9abb…

MALICIOUS

PDF

143.0 KB Created: 2021-06-16 04:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 55a6fea18df6cb4837e261f6a17fd1a1 SHA-1: 47bee912a094d828eac016ebf8d0ff18763774c7 SHA-256: 6fbaa42ecb0f9abbb3495d2eba30d6836c881ff06699df49e1dba43d45efab87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the heuristic findings and numerous URLs point to a pattern of spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=rolling+sky+ball PDF link annotation
    • http://stevis.cz/files/file/surexexipabaruloxizezik.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc376413fce---52456538760.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/gakaduzivijenibamulabeg.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/7e971595f456c04d5fda3b8ec2fc6a45/10123151698.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c487292c601---zarutobabodazavofimo.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/48brrtk4p8b4e5cc4qk8ruirq4/jebotajepuj.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/44164542308.pdfIn PDF document text
    • http://expresskaliski.info/file/letisavozegokixogasuf.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e1373d0e5e89e4fc0bb756c05e863ba0/gonozogusizuwegosujugipu.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729ceb8ac78---69139338189.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160984d6c168c9---kanukaritixopilokoxakat.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a389f0f1f79---24362040142.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4a76638d9ccc19ea229398c445e34e05/lotamaribabikube.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921b7ac4082---fubejivodoxigu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ea8d82d0b---80870613246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BF 6676 bytes
SHA-256: 0539076c370c55c43f3000ab9106972c29dcf607f965bb0121db26be4bee3933
font_01_sfnt_off00015162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15162 2960 bytes
SHA-256: ffe008f00bdab04e42d0fb58581e94ebe343bab047a3ea3be819508d06260cf3
font_02_sfnt_off00015bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD2 5068 bytes
SHA-256: 66cdc65a23ba0705f10b822a704b6883dd7c197f4d75ca9b0525a3e9cfa777f2
font_03_sfnt_off00016d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D33 37676 bytes
SHA-256: 1e5a17d6e4c635096e75a34644ecb2d6d4f367621490fd33fcf19da7aa47d6df
font_04_sfnt_off0001c891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C891 14644 bytes
SHA-256: c8349946bcde00b6d2b00673c77d12cfdbe22dad560c9d0fe1c62e4f9e3058f3
font_05_sfnt_off0001f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7F1 28744 bytes
SHA-256: f568930114d0da35cb419bbcd46dce89c3a3ab7593de0933b788d4d2013d68b4
font_06_sfnt_off00022449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22449 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

Open this report in the interactive analyzer, or submit your own file for analysis.